LIGHT INTENSITY PRE-LAB
Instructions: Use Slides 1-4 of “Light’s Interactive with Objects in the Universe” PowerPoint notes to
answer the following questions completely in your journal. You will not be allowed to begin the lab
before your finish these questions.
Pre-Lab Stamp
1. What do we call an object that emits light?
2. Define luminous flux:
a. What is its symbol?
b. What units is it measured in?
3. What do we call an object that reflects light from another source?
4. Define illuminance:
a. What is its symbol?
b. What units is it measured in?
5. Define luminous intensity:
a. What is its symbol?
b. What units is it measured in?
LIGHT INTENSITY PRE-LAB
Instructions: Use Slides 1-4 of “Light’s Interactive with Objects in the Universe” PowerPoint notes to
answer the following questions completely in your journal. You will not be allowed to begin the lab
before your finish these questions.
1. What do we call an object that emits light?
Pre-Lab Stamp
2. Define luminous flux:
a. What is its symbol?
b. What units is it measured in?
3. What do we call an object that reflects light from another source?
4. Define illuminance:
a. What is its symbol?
b. What units is it measured in?
5. Define luminous intensity:
a. What is its symbol?
b. What units is it measured in?
6. Define albedo:
a. How do we express an object’s albedo?
b. What is Earth’s planetary albedo?
7. PREDICT: How will light intensity vary with distance?
LIGHT INTENSITY POST-LAB
Instructions: Use Slide 5 of “Light’s Interactive with Objects in the Universe” PowerPoint notes to
answer the following questions completely in your journal.
1. List the equation that shows the relationship between light intensity and
distance:
a. Does this reflect your results from the lab?
6. Define albedo:
a. How do we express an object’s albedo?
b. What is Earth’s planetary albedo?
7. PREDICT: How will light intensity vary with distance?
LIGHT INTENSITY POST-LAB
Instructions: Use Slide 5 of “Light’s Interactive with Objects in the Universe” PowerPoint notes to
answer the following questions completely in your journal.
2. List the equation that shows the relationship between light intensity and
distance:
a. Does this reflect your results from the lab?